Two-layer advertisement audio retrieval method based on audio fingerprints

A technology for audio fingerprinting and advertising audio, which is applied in speech analysis, special data processing applications, instruments, etc., to achieve faster retrieval, strong practicability, and good application prospects.

Inactive Publication Date: 2015-01-28
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

Advertising audio is a kind of publicity or marketing means in the commercial sense. It has a more complex form than music in terms of physical signals. It may be human voice, musical i

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  • Two-layer advertisement audio retrieval method based on audio fingerprints
  • Two-layer advertisement audio retrieval method based on audio fingerprints
  • Two-layer advertisement audio retrieval method based on audio fingerprints

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Embodiment Construction

[0031] In order to make the object, technical solution and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] The main idea of ​​the present invention is to extract audio fingerprints of two different dimensions by using the frequency spectrum amplitude feature of advertisement audio, and perform two-layer retrieval. It can realize fast and accurate matching of advertisements under certain conditions.

[0033] Each step is described in detail below with a specific example:

[0034] Step S1: Extract the audio fingerprint of the audio to be retrieved, such as figure 2 .

[0035] The mobile phone records sound sources such as TV. The recording length is 4S, the sampling rate is 44.1KHz, the number of quantization bits is 16bit, and the format is a PCM-encoded wav file.

[0036] Then use the Hanning window to frame the data part of the...

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Abstract

The invention relates to a two-layer advertisement audio retrieval method based on audio fingerprints. The method includes the steps: firstly, extracting two different-dimensional audio fingerprints based on spectral amplitude features of audios; secondly, performing two-layer retrieval based on the two audio fingerprints. Advertisements are accurately matched based on audio fingerprint technology. On one hand, the extracted audio fingerprints have excellent anti-noise property, and advertisement matching accuracy is high. On the other hand, the audio fingerprints are much smaller than original audio data, and retrieval can be rapidly performed by the two-layer retrieval method. Therefore, the method has wide practical values and application prospects in the field of commercial application and scientific research.

Description

technical field [0001] The invention relates to a novel advertisement audio retrieval method, in particular to a two-layer retrieval method based on two audio fingerprints, and belongs to the field of computer science multimedia information retrieval. Background technique [0002] Audio fingerprint refers to a content-based compact digital signature that can represent a piece of audio features. Its purpose is to calculate the content-based features of a piece of audio for retrieval and matching in the audio feature database. Audio fingerprint is for the physical data of audio, instead of using name, author and other information. Audio fingerprint requires robustness to make audio retrieval have certain noise resistance, and requires discrimination to distinguish different audio. [0003] Now, in addition to the traditional search by name, music search methods have also been widely used based on content. Audio fingerprinting technology has also begun to be applied in the fie...

Claims

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Application Information

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IPC IPC(8): G06F17/30G10L25/03
CPCG06F16/683G10L25/18
Inventor 肖利民隋东辉阮利祝明发李书攀
Owner BEIHANG UNIV
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